Microstructure of hot-pressed Ti(C,N)-based cermets |
| |
| Affiliation: | 1. School of Materials Science and Engineering, Xihua University, Chengdu 610039, PR China;2. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, PR China;3. Centre for Infrastructure Performance and Reliability, The University of Newcastle, Newcastle, Australia;1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China;2. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, PR China |
| |
| Abstract: | Starting from commercial nanosize TiN and carbon black powders, this study set up a synthesis of fine and pure Ti(C,N) powders. The best experimental conditions were found using a mixture TiN+10 wt.% of C processed at 1430 °C for 3 h under flowing Argon. The as-produced Ti(C,N) powder showed regularly shaped particles (100–300 nm), little agglomeration and a C/(C+N) atomic ratio ranging from 0.4 to 0.6. A mixture of Ti(C,N) +15.3 wt% of WC and 9.1 wt% of Ni+Co was prepared and hot pressed at 1620 °C for 30 min (5 MPa of applied pressure). Microstructure and some properties of the sintered ceramic–metal composite (cermet) was investigated by SEM-EDX and XRD. The material exhibited a refined microstructure, but also the presence of textured flaws of several tenths of microns, attributed to not-optimized sintering conditions. The results were compared with those obtained from a cermet manufactured with the same nominal formulation but with commercial TiC0.5N0.5 raw powder. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
